Author/Authors :
Aslam Khan, Sher NWFP Tarnab - Pakistan Oilseed Development Board, Pakistan , Qureshi, Afsari Sharif Quaid-e-Azam University - Department of Biological Sciences, Pakistan , Ashraf, Muhammad NARC, Pakistan , Masaud Khan, Shah Arid Agriculture University, Pakistan , Ajmal, Saifullah Federal Seed Certification and Registration, Pakistan , Khalil, Iftikhar H. NWFP Agricultural University - Department of Plant Breeding Genetics, Pakistan
Abstract :
Eight sunflower parents and their sixteen F] hybrids were evaluated at Agricultural Research Institute, Tarnab, Peshawar during autumn 2003-04 to estimate mid and high parent heterosis for seed yield and oil content. A randomized complete block design with three replicates was used. Highly significant genetic differences (P 0.01) were observed among parents and F| hybrids for yield hectare1, harvest index, moisture factor and oil content. Mid parent and high parent heterosis estimates of Fj hybrids ranged from 5.60 to 185.02% and -9.06 to 181.73% for yield hectare 23.33 to 171.66% and - 43.91 to 127.36% for harvest index, 11.19 to -30.35 and 19.13 to -20.71% for moisture factor and -^.78 to 52.85% and - 18.39 to 42.50% for oil content, respectively. Hybrid TS-18 x 291RGI showed highest positive mid and high parent heterotic effects for yield hectare1, TS-335 x 291RGI expressed highest positive mid and high parent heterotic magnitude for harvest index, TS-228 x 291RG1 had highest negative mid and high parent heterosis for moisture factor and TS-335 x 291RGI expressed highest positive mid and high parent heterotic estimates for oil content. Based on mean performance and mid and high parent heterotic effects for seed yield and oil traits, parents of these three hybrids are suggested for use in sunflower breeding program
